TEL (Telephone Electronics Line) was a small publication that was dedicated to phone phreaking and hacking. The Teletronics Company of America began publishing it monthly in November 1974 with Jack Kranyak the Editor-in-Chief. TEL was similar to TAP, but was geared totally toward phone phreaking.

In 1975, Pacific Telephone & Telegraph (PT&T) won a lawsuit against the publishers of TEL. The Superior Court of California ordered TEL to stop publishing immediately. Though never challenged in court, this was truly a violation of First Amendment rights. A letter was mailed to all subscribers advising them to destroy all back issues of TEL.